ξ Scorpii (xi Scorpii)

Altitude: -21.3° Azimuth: 278.6° Direction: West

ξ Scorpii is a multiple sub-giant star in the constellation of Scorpius.

ξ Scorpii visual magnitude is 4.77. Because of its moderate brightness, ξ Scorpii should be easily visible from locations with dark skyes, while it can be barely visible, or not visible at all, from skyes affected by light pollution.

The table below summarizes the key facts about ξ Scorpii:

Color of ξ Scorpii ⬤

Magnitude of ξ Scorpii 4.77

Class Sub-giant

VISIBILITY RIGHT NOW

ξ Scorpii (xi Scorpii) is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -21.3°
Azimuth: 278.6°
Direction: West

Celestial coordinates and finder chart of ξ Scorpii

ξ Scorpii is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year. Celestial coordinates for the J2000 equinox as well as galactic coordinates of ξ Scorpii are provided in the following table:

Right Ascension J2000 16h 04m 22s

Declination J2000 -11° 22’ 23”

Galactic Longitude 0.02°

Galactic Latitude 29.42°

Constellation Scorpius

The simplified sky map below shows the position of ξ Scorpii in the sky:

Finder chart ξ Scorpii (xi Scorpii) star

Simplified finder chart for ξ Scorpii (xi Scorpii).

Visibility of ξ Scorpii from your location

Location: Greenwich, United Kingdom edit_location_alt
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Today's ξ Scorpii (xi Scorpii) rise, transit and set times from Greenwich, United Kingdom edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 101.4° RISE 19:00

Max altitude: 27.1° TRANSIT 0:00

Azimuth: 258.6° SET 5:03

RIGHT NOW ξ Scorpii (xi Scorpii) is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of ξ Scorpii

The image below is a photograph of ξ Scorpii from the Digitized Sky Survey 2 (DSS2 - see the credits section) taken in the red channel. The area of sky represented in the image is 0.5x0.5 degrees (30x30 arcmins). The proper motion of ξ Scorpii is -0.06 arcsec per year in Right Ascension and -0.029 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of ξ Scorpii. The red arrow shows the motion of ξ Scorpii during the next 10000 years (-10.00 arcmin in Right Ascension and -4.83 arcmin in declination);

Distance of ξ Scorpii from the Sun and relative movement

ξ Scorpii is distant 79.32 light years from the Sun and it is moving towards the Sun at the speed of 29 kilometers per second.

Distance (parsec) 24.33 pc

Distance (light year) 79.32 ly

Heliocentric radial velocity -29 km/s

Proper Motion RA -0.06 arcsec/year

Proper Motion Dec -0.029 arcsec/year

Spectral properties of ξ Scorpii

ξ Scorpii belongs to spectral class F5 and has a luminosity class of IV corresponding to a sub-giant star.

Absolute magnitude 2.84

Spectral Type F5IV

Color Index (B-V) 0.47

Temperature of ξ Scorpii 6528K

The red dot in the diagram below shows where ξ Scorpii is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of ξ Scorpii. Attribution: Richard Powell / CC BY-SA

ξ Scorpii star system properties

ξ Scorpii is a visual double star which can be observed with the help of large telescopes. The table below shows key information about the ξ Scorpii double sysyem:

Main star magnitude 4.77

Secondary star magnitude 4.97

Magnitude difference 0.2

Separation 1.2 arcsec

Alternative designations of ξ Scorpii

Bayer designation ξ Scorpii
(xi Scorpii)

Henry Draper Catalogue HD144070

SAO Catalogue SAO159665

Durchmusterung Catalogue BD-10 4237

Gliese Catalogue Wo 9540 A

Aitken Double Star Catalogue ADS9909

In Evidence

Other stars in Scorpius